less css scoping test

less_scope_test.less

@test: 0;

.mixin() when (@test = 0) { background: blue !important; }
.mixin() when (@test = 1) { @test: 2; background: red !important; }
.mixin() when (@test = 2) { background: black !important; }

body {
  @test: 1;
  .mixin;
  .mixin;
}

// body ends up being red meaning:
//  a) scope of conditional mixins (guard expressions) is looked up from the calling point, not the declaration point (a good thing), and
//  b) can't change nonlocal variables